International S1854 front side marker bulbs use 168 or 1895 bulb sizes, while rear side marker bulbs use 168 size. The replacement chart covers vehicle production years spanning 1981 to 1989 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1854 uses two bulb types across its front side marker positions: the 168 and the 1895. Both are ANSI-standard miniature wedge bulbs rated for 12-volt systems, though they differ in wattage and physical size.
The 168 bulb follows the T10 wedge form factor and draws 4.9 watts. It is the sole bulb type used across all model years (1981-1989) for the rear side marker position on the International S1854.
The 1895 bulb follows the smaller T5 wedge form factor and draws only 0.9 watts, making it significantly lower in power consumption than the 168.
Because the T10 and T5 wedge bases are physically different sizes, the 168 and 1895 bulbs are not interchangeable, even though both use a wedge-style base and operate on 12 volts.
For the front side marker position, the International S1854 used the 1895 bulb in 1984, 1985, and 1987, while the 168 bulb was fitted in 1981-1983, 1986, 1988, and 1989.
The front side marker specification for the International S1854 is not uniform across its production span, meaning the correct bulb type depends on the specific model year rather than a single standard fitment.